EP0507306B1 - Belt transport system - Google Patents

Belt transport system Download PDF

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Publication number
EP0507306B1
EP0507306B1 EP92105720A EP92105720A EP0507306B1 EP 0507306 B1 EP0507306 B1 EP 0507306B1 EP 92105720 A EP92105720 A EP 92105720A EP 92105720 A EP92105720 A EP 92105720A EP 0507306 B1 EP0507306 B1 EP 0507306B1
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EP
European Patent Office
Prior art keywords
transport
belt
smoothing
belts
sheet material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92105720A
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German (de)
French (fr)
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EP0507306A1 (en
Inventor
Markus Haberstroh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GAO Gesellschaft fuer Automation und Organisation mbH
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GAO Gesellschaft fuer Automation und Organisation mbH
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Publication of EP0507306A1 publication Critical patent/EP0507306A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
    • B65H5/021—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
    • B65H5/023—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts between a pair of belts forming a transport nip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/36—Article guides or smoothers, e.g. movable in operation
    • B65H5/38—Article guides or smoothers, e.g. movable in operation immovable in operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/32—Orientation of handled material
    • B65H2301/321—Standing on edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/261—Arrangement of belts, or belt(s) / roller(s) facing each other for forming a transport nip

Definitions

  • the invention relates to a belt transport system for transporting sheet material according to the preamble of claim 1.
  • Belt transport systems for transporting sheet material are known in multiple embodiments.
  • DE-OS 27 29 830 mentions such a transport system for transporting documents, banknotes or the like, which consists of several round belts running in parallel.
  • the round belts are guided and driven via pairs of transport rollers.
  • the transport belts are positioned so that the sheet material to be transported is clamped between the belts, fixed and can be transported in this way.
  • the transport system is divided into several transport sections in which the transport belts, which are designed as endless belts, circulate. At the beginning and at the end of these transport sections, deflection rollers are provided through which the endless belts are returned.
  • the transport of the sheet material clamped between the belts is relatively unproblematic when it is in good condition, ie with smooth, undamaged sheets. If the condition is poor, especially if there are dog ears or tears, there is a risk that parts of the sheet material from the normal transport plane are bent behind the transport belts to such an extent that they become jammed between the transport belts and transport rollers during transport. If this happens, for example, in the area of the deflection rollers or in areas in which the running direction of the endless belts deviates from the transport direction of the sheet material, at least the part of the sheet material clamped between the transport roller and belt becomes out of the intended transport direction in the running direction of the transport belt forced.
  • baffles either the pinched part of the sheet is torn off or the sheet is pulled between the transport roller and baffle in such a way that the transport path is blocked and the function of the transport system is no longer guaranteed. If no guide plates or the like are provided in the deflection area, the clamped sheet follows the running direction of the belt and is thus removed from the transport path, which is equally to be avoided.
  • JP-A 63-230467 which corresponds to the preamble of claim 1, shows a belt transport system in which the sheet material is transported in the clamped state between two transport belts.
  • a serrated sheet is provided on the back of the conveyor belt. This is arranged in such a way that the parts of the sheet material protruding behind the transport belts run onto the serrated sheet during transport. The parts protruding behind the conveyor belts are either cut off by the "scraper" or folded inwards onto the sheet material.
  • the serrated sheet in particular the serrations in the form of surfaces which are oriented either perpendicularly or parallel to the transport plane, furthermore means that high forces occur when the parts projecting behind the transport belts are folded over. This is particularly likely to result in further damage to the sheet material, especially with sheets in poor condition and at higher transport speeds.
  • DE-PS 27 29 968 describes such a device for smoothing overturned corners on paper documents.
  • the solution to this problem is seen in the fact that the document is guided into a slit-shaped gap, the clear width of which only slightly exceeds the thickness of the document and the inlet flank of which runs at an acute angle to the transport direction. It can be seen from the description of the invention that the shape of the flanks of the gap is intended to fold back the dog's ear while the document is being pulled through the gap.
  • the object of the invention is therefore to propose a belt transport system which has means with which bent parts of the sheet material are at least so far removed from the area of the belt without damaging it that jamming between the transport roller and belt is prevented.
  • the measures according to the invention can be used regardless of the condition of the sheet material. Since the stripping elements are assigned to the individual transport belts and, in special embodiments, are also effective on both sides of the belt, not only can bent corners, but also dog ears in the inner region of the edges, i. H. in the area of tears. This means that the stripping elements can also be used successfully in multi-belt systems. The function of the stripping elements is ensured even at high transport speeds without damaging the sheet material. In addition, the manufacture of the elements is extremely inexpensive and can also be subsequently integrated into existing transport systems.
  • Fig. 1 shows a belt transport system in section, in which a sheet material 1 is transported clamped between the transport belt 2.
  • the transport belts 2 are guided by transport rollers 3. These are in turn attached to a mounting plate 4.
  • Fig. 2 shows a part of the transport system shown in Fig. 1 in plan view.
  • the sheet material 1 to be transported is transferred in the transport direction 5 from the end transport rollers of the transport section 6 to the input transport rollers of the transport section 7.
  • the transport belts are deflected in the area of the respective pairs of transport rollers and returned to the respective opposite end of the respective transport section.
  • baffles are provided between the two transport sections 6 and 7 to ensure the clean transfer of the sheet material, the dog's ear clamped in by the transport belt 2 is either torn off, since the rest of the sheet material is forced in the planned transport direction, or the sheet material in the area the baffles are deformed in such a way that trouble-free onward transport is no longer possible (jam formation).
  • FIG. 3 shows a detail from a further variant of a belt transport system, in which the transport belts are replaced on one side by transport rollers 11 and guide plates 12. Similar to FIG. 2, the transport belt 2 on the transport roller 3 is also deflected in FIG. 3. The transported goods 1 are transported between the transport roller 11 and the transport belt 2 in the direction of arrow 5.
  • the sheet material 1 has a dog's ear 13 which is bent over the transport belt so far behind the transport belt 2 that it could be pinched between the roller and the belt when the deflection roller 3 is reached without additional measures.
  • the stripping element 14 is now provided.
  • Fig. 4 and Fig. 5 three such stripping elements are shown attached to a mounting plate 18.
  • the stripping elements 14 are each arranged symmetrically on the back of the belt 2 to the belt. They have sliding grooves 19, in which the belt runs as close as possible, and symmetrically to the longitudinal axis of the transport belt, two stripping surfaces 17 with which dog-ears can be pressed out of the rear clamping area of the belt on both sides of the belt.
  • FIG. 4 The arrangement shown in FIG. 4 is expediently positioned analogously to FIG. 3, shortly before the deflection roller 3, in such a way that the smallest possible distance remains between the deflection roller 3 and the stripping element, so that a dog's ear 13 does not find any possibility until the deflection roller 3 is reached, to slide behind the conveyor belt. Since the transport belt dips into the stripping element and is therefore partially covered by the stripping element in the critical area, direct contact between the transport belt and the dog's ear is effectively avoided.
  • Fig. 6 shows the stripping element according to the invention in different views. It can be seen that the stripping element viewed from the transport direction of the application (see FIG. 4) is conical-pointed, the stripping surfaces 17 and the sliding groove 19 extending from the tip 20 along the element.
  • the sliding groove 19 digs deeper and deeper into the stripping element starting from the tip 20, so that the belt is viewed deeper and deeper by the stripping element when viewed from the tip 20.
  • the stripping surfaces 17 have an approximately triangular basic shape on, which, relative to the center line of the conveyor belt 2, are arranged parallel to the conveyor belt at a slightly increasing acute angle.
  • the stripping surfaces 17 are formed by correspondingly bent stripping angles 23 which are mounted on a mounting plate 22.
  • the brackets 23 are designed such that they bend the donkey ears 13 around the transport belt while moving past the oblique edge upwards and thus also push the donkey ear out of the clamping area of the transport belt 2.
  • the stripping angles 23 only detect the donkey ears coming from one side of the belt.
  • a mode of operation which is bilateral per transport belt is possible by means of a corresponding symmetrical structure, i. H. in the sense of FIG. 6 by providing two opposite stripping surfaces per conveyor belt.
  • a stripping angle 23 constructed symmetrically in this way therefore offers the same possibilities as the stripping element 14 shown in FIG. 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Belt Conveyors (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Prostheses (AREA)

Abstract

System for transporting material in the form of thin sheets (1), in which the sheets (1) are taken hold of by transport belts (2) and are transported while clamped, stripping elements (14, 23) being provided on the rear of the belts (2), which stripping elements (14, 23) are arranged and designed in such a way that parts (13) of the sheets (1) which project behind the transport belts (2) run up onto the stripping element (14, 23) while being transported past and are pressed out of the rear clamping region of the belt (2). <IMAGE>

Description

Die Erfindung betrifft ein Riementransportsystem zum Transport von Blattgut gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a belt transport system for transporting sheet material according to the preamble of claim 1.

Riementransportsysteme zum Transport von Blattgut sind in vielfachen Ausführungsformen bekannt. In der DE-OS 27 29 830 ist beispielsweise ein derartiges Transportsystem zum Transport von Belegen, Banknoten oder dergleichen erwähnt, das aus mehreren parallel laufenden Rundriemen besteht. Die Rundriemen werden über Transportrollenpaare geführt und angetrieben. Die Transportriemen sind so zueinander positioniert, daß das zu transportierende Blattgut zwischen die Riemen geklemmt, fixiert und auf diese Weise transportiert werden kann. Das Transportsystem ist in mehrere Transportabschnitte unterteilt, in denen die als Endlosriemen ausgeführten Transportriemen umlaufen. Zu Beginn und am Ende dieser Transportabschnitte sind jeweils Umlenkrollen vorgesehen, über die die Endlosriemen wieder zurückgeführt werden.Belt transport systems for transporting sheet material are known in multiple embodiments. DE-OS 27 29 830, for example, mentions such a transport system for transporting documents, banknotes or the like, which consists of several round belts running in parallel. The round belts are guided and driven via pairs of transport rollers. The transport belts are positioned so that the sheet material to be transported is clamped between the belts, fixed and can be transported in this way. The transport system is divided into several transport sections in which the transport belts, which are designed as endless belts, circulate. At the beginning and at the end of these transport sections, deflection rollers are provided through which the endless belts are returned.

Der Transport des zwischen die Riemen geklemmten Blattguts ist bei gutem Erhaltungszustand, d. h. bei glatten, unbeschädigten Blättern, relativ unproblematisch. Bei schlechtem Erhaltungszustand, insbesondere bei Vorliegen von Eselsohren oder Einrissen, besteht jedoch die Gefahr, daß Teile des Blattguts aus der normalen Transportebene soweit hinter die Transportriemen gebogen sind, daß sie während des Transports zwischen Transportriemen und Transportrollen geklemmt werden. Geschieht dies beispielsweise im Bereich der Umlenkrollen bzw. in Bereichen, in denen die Laufrichtung der Endlosriemen von der Transportrichtung des Blattguts abweicht, so wird zumindest der zwischen Transportrolle und Riemen eingeklemmte Teil des Blattguts aus der beabsichtigten Transportrichtung heraus in die Laufrichtung des Transportriemens gezwungen. Sind technische Maßnahmen vorgesehen, die dafür zu sorgen haben, daß das Blattgut trotz der Riemenumlenkung in der vorgesehenen Transportrichtung gehalten wird, z. B. durch entsprechende Leitbleche, wird entweder der eingeklemmte Teil des Blattes abgerissen oder das Blatt derart zwischen Transportrolle und Leitblech gezogen, daß der Transportpfad verstopft und damit die Funktion des Transportsystems nicht mehr gewährleistet ist. Sind im Umlenkbereich keine Leitbleche oder dergleichen vorgesehen, folgt das eingeklemmte Blatt der Laufrichtung des Riemens und wird somit aus dem Transportpfad entferne, was gleichermaßen zu vermeiden ist.The transport of the sheet material clamped between the belts is relatively unproblematic when it is in good condition, ie with smooth, undamaged sheets. If the condition is poor, especially if there are dog ears or tears, there is a risk that parts of the sheet material from the normal transport plane are bent behind the transport belts to such an extent that they become jammed between the transport belts and transport rollers during transport. If this happens, for example, in the area of the deflection rollers or in areas in which the running direction of the endless belts deviates from the transport direction of the sheet material, at least the part of the sheet material clamped between the transport roller and belt becomes out of the intended transport direction in the running direction of the transport belt forced. Are technical measures provided to ensure that the sheet material is held in the intended direction of transport despite the belt deflection, for. B. by appropriate baffles, either the pinched part of the sheet is torn off or the sheet is pulled between the transport roller and baffle in such a way that the transport path is blocked and the function of the transport system is no longer guaranteed. If no guide plates or the like are provided in the deflection area, the clamped sheet follows the running direction of the belt and is thus removed from the transport path, which is equally to be avoided.

Die JP-A 63-230467, die dem Oberbegriff des Anspruchs 1 entspricht, zeigt ein Riementransportsystem, bei dem das Blattgut im geklemmten Zustand zwischen zwei Transportriemen transportiert wird. Auf der Rückseite der Transportriemen ist ein gezacktes Blech (scraper) vorgesehen. Dieses ist so angeordnet, daß die hinter die Transportriemen ragenden Teile des Blattgutes während des Vorbeitransports auf das gezackte Blech auflaufen. Die hinter die Transportriemen ragenden Teile werden nun vom "scraper" entweder abgeschnitten oder nach innen auf das Blattgut gefaltet.JP-A 63-230467, which corresponds to the preamble of claim 1, shows a belt transport system in which the sheet material is transported in the clamped state between two transport belts. A serrated sheet (scraper) is provided on the back of the conveyor belt. This is arranged in such a way that the parts of the sheet material protruding behind the transport belts run onto the serrated sheet during transport. The parts protruding behind the conveyor belts are either cut off by the "scraper" or folded inwards onto the sheet material.

Im Falle eines Abschneidens der hinter die Transportriemen ragenden Teile kann jedoch eine sichere Funktion des Transportsystems nicht mehr gewährleistet werden, da sich die abgeschnittenen Teile unkontrolliert durch die Vorrichtung bewegen und den Transportpfad verstopfen können. Die Konstruktion des gezackten Bleches, insbesondere der Zacken in Form von Flächen, die entweder senkrecht oder parallel zur Transportebene orientiert sind, führt weiterhin dazu, daß beim Umfalten der hinter die Transportriemen ragenden Teile hohe Kräfte auftreten. Gerade bei Blättern mit schlechtem Erhaltungszustand und bei höheren Transportgeschwindigkeiten, führt dies mit hoher Wahrscheinlichkeit zu einer weiteren Beschädigung des Blattguts.If the parts protruding behind the transport belts are cut off, however, a reliable function of the transport system can no longer be guaranteed, since the cut parts move uncontrollably through the device and can clog the transport path. The construction of the serrated sheet, in particular the serrations in the form of surfaces which are oriented either perpendicularly or parallel to the transport plane, furthermore means that high forces occur when the parts projecting behind the transport belts are folded over. This is particularly likely to result in further damage to the sheet material, especially with sheets in poor condition and at higher transport speeds.

Die Beseitigung von Eselschren während des Transports ist technisch äußerst schwierig zu lösen. In der DE-PS 27 29 968 ist beispielsweise eine derartige Vorrichtung zum Glattstreichen von umgeknickten Ecken an Papierbelegen beschrieben. Die Lösung dieses Problems wird dabei darin gesehen, daß der Beleg in einen schlitzförmigen Spalt geführt wird, dessen lichte Weite die Dicke des Belegs nur geringfügig überschreitet und dessen Einlaufflanke in einem spitzen Winkel zur Transportrichtung verläuft. Der Erfindungsbeschreibung ist zu entnehmen, daß die Form der Flanken des Spaltes ein Zurückfalten des Eselsohrs bewirken soll, während das Dokument durch den Spalt gezogen wird.The removal of donkey crates during transport is technically extremely difficult to solve. DE-PS 27 29 968, for example, describes such a device for smoothing overturned corners on paper documents. The solution to this problem is seen in the fact that the document is guided into a slit-shaped gap, the clear width of which only slightly exceeds the thickness of the document and the inlet flank of which runs at an acute angle to the transport direction. It can be seen from the description of the invention that the shape of the flanks of the gap is intended to fold back the dog's ear while the document is being pulled through the gap.

Es ist leicht einzusehen, daß das Einfädeln des Belegs in den Spalt immer dann Probleme bereitet, wenn die Vorderkante des Belegs nicht exakt senkrecht verläuft, d. h. bei allen Belegen schlechten Erhaltungszustandes. Aber auch bei richtig eingeführtem Beleg besteht die Gefahr, daß das Eselsohr während des Durchlaufs vom Dokument abgeschert wird, wobei die Wahrscheinlichkeit dafür mit höher werdender Transportgeschwindigkeit zunimmt.It is easy to see that threading the document into the gap is always problematic when the leading edge of the document is not exactly vertical, ie with all documents in poor condition. But even if the document is correctly inserted, there is a risk that the dog's ear will be sheared off from the document during the passage, the probability of this increasing with increasing transport speed.

Aufgabe der Erfindung ist es daher, ein Riementransportsystem vorzuschlagen, das Mittel aufweist, mit denen umgeknickte Teile des Blattguts ohne Beschädigung desselben zumindest so weit aus dem Bereich der Riemen entfernt werden, daß ein Verklemmen zwischen Transportrolle und Riemen verhindert wird.The object of the invention is therefore to propose a belt transport system which has means with which bent parts of the sheet material are at least so far removed from the area of the belt without damaging it that jamming between the transport roller and belt is prevented.

Die Aufgabe wird erfindungsgemäß mittels der im Kennzeichen des Anspruchs 1 genannten Maßnahmen gelöst.The object is achieved by means of the measures mentioned in the characterizing part of claim 1.

Weiterbildungen sind den abhängigen ansprüchen zu entnehmen.Further training can be found in the dependent claims.

Besonders vorteilhaft erweist es sich, daß die erfindungsgemäßen Maßnahmen unabhängig vom Erhaltungszustand des Blattgutes einsetzbar sind. Da die Ausstreifelemente den einzelnen Transportriemen zugeordnet und in speziellen Ausführungsformen auch zu beiden Seiten des Riemens wirksam sind, können nicht nur umgeknickte Eckbereiche, sondern auch Eselsohren im inneren Bereich der Kanten, d. h. im Bereich von Einrissen, berücksichtigt werden. Damit sind die Ausstreifelemente auch bei Mehrriemensystemen erfolgreich einsetzbar. Die Funktion der Ausstreifelemente ist auch bei hohen Transportgeschwindigkeiten ohne Beschädigung des Blattgutes sichergestellt. Darüber hinaus ist die Herstellung der Elemente äußerst preiswert und auch in bestehenden Transportsystemen nachträglich zu integrieren.It proves to be particularly advantageous that the measures according to the invention can be used regardless of the condition of the sheet material. Since the stripping elements are assigned to the individual transport belts and, in special embodiments, are also effective on both sides of the belt, not only can bent corners, but also dog ears in the inner region of the edges, i. H. in the area of tears. This means that the stripping elements can also be used successfully in multi-belt systems. The function of the stripping elements is ensured even at high transport speeds without damaging the sheet material. In addition, the manufacture of the elements is extremely inexpensive and can also be subsequently integrated into existing transport systems.

Nachfolgend sind verschiedene Ausführungsformen der Erfindung anhand der Figur beispielsweise beschrieben. Darin zeigt:

Fig. 1
ein Riementransportsystem mit zu transportierendem Blattgut in Schnittdarstellung,
Fig. 2
den Übergang zwischen zwei Transportabschnitten in Draufsicht,
Fig. 3
einen Transportsystembereich mit Ausstreifelement,
Fig. 4
eine Detaildarstellung von drei Ausstreifelementen in räumlicher Darstellung,
Fig. 5
eine Seitenansicht der in Fig. 4 gezeigten Ausstreifelemente,
Fig. 6
das Ausstreifelement in verschiedenen Ansichten,
Fig. 7
eine vereinfachte Ausführungsform des erfindungsgemäßen Funktionsprinzips.
Various embodiments of the invention are described below with reference to the figure, for example. It shows:
Fig. 1
a belt transport system with sheet material to be transported in a sectional view,
Fig. 2
the transition between two transport sections in plan view,
Fig. 3
a transport system area with stripping element,
Fig. 4
a detailed representation of three stripping elements in a spatial representation,
Fig. 5
3 shows a side view of the stripping elements shown in FIG. 4,
Fig. 6
the stripping element in different views,
Fig. 7
a simplified embodiment of the functional principle according to the invention.

Fig. 1 zeigt ein Riementransportsystem im Schnitt, bei dem ein Blattgut 1 zwischen Transportriemen 2 eingeklemmt transportiert wird. Die Transportriemen 2 werden von Transportrollen 3 geführt. Diese sind wiederum auf einer Montageplatte 4 befestigt.Fig. 1 shows a belt transport system in section, in which a sheet material 1 is transported clamped between the transport belt 2. The transport belts 2 are guided by transport rollers 3. These are in turn attached to a mounting plate 4.

Fig. 2 zeigt einen Teil des in Fig. 1 dargestellten Transportsystems in Draufsicht. Das zu transportierende Blattgut 1 wird dabei in Transportrichtung 5 von den Endtransportrollen des Transportabschnittes 6 an die Eingangstransportrollen des Transportabschnitts 7 übergeben. Die Transportriemen werden im Bereich der jeweiligen Transportrollenpaare umgelenkt und zum jeweiligen entgegengesetzten Ende des jeweiligen Transportabschnitts zurückgeführt.Fig. 2 shows a part of the transport system shown in Fig. 1 in plan view. The sheet material 1 to be transported is transferred in the transport direction 5 from the end transport rollers of the transport section 6 to the input transport rollers of the transport section 7. The transport belts are deflected in the area of the respective pairs of transport rollers and returned to the respective opposite end of the respective transport section.

Ragt nun bei einem Beleg 1, der sich den Transportrollen 3 des Transportabschnitts 6 nähert, ein Eselsohr über den Transportriemen 2, so besteht in den trichterförmigen Übergangsbereichen 8 die Gefahr, daß sich dieses Eselsohr zwischen Transportrolle 3 und Riemen 2 klemmt und somit während der gesamten Transportrollenumschlingung vom Transportriemen festgehalten wird. Der Beleg wird in diesem Fall nicht in der beabsichtigten Transportrichtung 5 an die Transportrollen des folgenden Transportabschnittes 7, sondern um die jeweilige Transportrolle 3 herum in die durch die Pfeile 9 dargestellte Laufrichtung der Riemen 2 transportiert. Sind zwischen den beiden Transportabschnitten 6 und 7 zur Sicherstellung der sauberen Übergabe des Blattgutes Leitbleche (nicht dargestellt) vorgesehen, so wird das von Transportriemen 2 eingeklemmte Eselsohr entweder abgerissen, da der Rest des Blattguts in die geplante Transportrichtung gezwungen wird, oder das Blattgut im Bereich der Leitbleche derart deformiert, daß der störungsfreie Weitertransport nicht mehr möglich ist (Staubildung).If a document 1 that approaches the transport rollers 3 of the transport section 6 now protrudes a dog-ear above the transport belt 2, there is a danger in the funnel-shaped transition areas 8 that this dog-ear gets stuck between the transport roller 3 and belt 2 and thus throughout the entire process Transport roller wrap from Transport belt is held. In this case, the document is not transported in the intended transport direction 5 to the transport rollers of the following transport section 7, but rather around the respective transport roller 3 in the running direction of the belts 2 shown by the arrows 9. If baffles (not shown) are provided between the two transport sections 6 and 7 to ensure the clean transfer of the sheet material, the dog's ear clamped in by the transport belt 2 is either torn off, since the rest of the sheet material is forced in the planned transport direction, or the sheet material in the area the baffles are deformed in such a way that trouble-free onward transport is no longer possible (jam formation).

Fig. 3 zeigt einen Auschnitt aus einer weiteren Variante eines Riementransportsystems, bei dem die Transportriemen einseitig durch Transportrollen 11 und Leitbleche 12 ersetzt sind. Ähnlich wie in Fig. 2 wird auch in Fig. 3 der Transportriemen 2 an der Transportrolle 3 umgelenkt. Das Transportgut 1 wird zwischen Transportrolle 11 und Transportriemen 2 in Richtung des Pfeils 5 transportiert. Im vorliegenden Fall weist das Blattgut 1 ein Eselsohr 13 auf, das über den Transportriemen hinweg soweit hinter den Transportriemen 2 gebogen ist, daß es bei Erreichen der Unlenkrolle 3 ohne zusätzliche Maßnahmen zwischen Rolle und Riemen eingeklemmt werden könnte. Zur Verhinderung des Einklemmens ist nun das Ausstreifelement 14 vorgesehen. Es ist derart auf der Rückseite des Riemens 2 angeordnet, daß hinter den Transportriemen ragende Teil des Blattguts, beispielsweise das Eselsohr 13, mit der Vorderkante 16 auf der Ausstreiffläche 17 aufläuft und dabei wie auf einer schiefen Ebene so weit nach oben gedrückt wird, daß es bei Erreichen der Transportrolle 3 aus dem Klemmbereich des Transportriemens 2 entfernt ist. Nachdem die Vorderkante des Blattguts an der Transportrolle 3 vorbeitransportiert wurde, wird mittels der Leitbleche 12 und 15 die fehlerfreie Übergabe an den folgenden Transportabschnitt sichergestellt.FIG. 3 shows a detail from a further variant of a belt transport system, in which the transport belts are replaced on one side by transport rollers 11 and guide plates 12. Similar to FIG. 2, the transport belt 2 on the transport roller 3 is also deflected in FIG. 3. The transported goods 1 are transported between the transport roller 11 and the transport belt 2 in the direction of arrow 5. In the present case, the sheet material 1 has a dog's ear 13 which is bent over the transport belt so far behind the transport belt 2 that it could be pinched between the roller and the belt when the deflection roller 3 is reached without additional measures. In order to prevent pinching, the stripping element 14 is now provided. It is arranged in such a way on the back of the belt 2 that behind the transport belt protruding part of the sheet material, for example the donkey ear 13, runs with the leading edge 16 on the stripping surface 17 and is pressed upwards as on an inclined plane so that it when the transport roller 3 is reached is removed from the clamping area of the transport belt 2. After the leading edge of the sheet material has been transported past the transport roller 3, the guide plates are used 12 and 15 ensure the error-free transfer to the next transport section.

In Fig. 4 und Fig. 5 sind drei derartige Ausstreifelemente auf einem Montageblech 18 befestigt dargestellt. Die Ausstreifelemente 14 sind jeweils auf der Rückseite der Riemen 2 zum Riemen symmetrisch angeordnet. Sie weisen Gleitrillen 19 auf, in denen der Riemen mit möglichst geringem Abstand vorbeiläuft sowie symmetrisch zur Längsachse des Transportriemens zwei Ausstreifflächen 17, mit denen zu beiden Seiten des Riemens Eselsohren aus dem rückwärtigen Klemmbereich des Riemens gedrückt werden können.In Fig. 4 and Fig. 5 three such stripping elements are shown attached to a mounting plate 18. The stripping elements 14 are each arranged symmetrically on the back of the belt 2 to the belt. They have sliding grooves 19, in which the belt runs as close as possible, and symmetrically to the longitudinal axis of the transport belt, two stripping surfaces 17 with which dog-ears can be pressed out of the rear clamping area of the belt on both sides of the belt.

Die in Fig. 4 dargestellte Anordnung wird sinnvollerweise analog zu Fig. 3, kurz vor der Umlenkrolle 3 derart positioniert, daß zwischen Umlenkrolle 3 und Abstreifelement ein möglichst geringer Abstand verbleibt, so daß ein Eselsohr 13 bis zum Erreichen der Umlenkrolle 3 keine Möglichkeit findet, sich hinter den Transportriemen zu schieben. Da der Transportriemen in das Ausstreifelement eintaucht und deshalb im kritischen Bereich vom Ausstreifelement sogar teilweise abgedeckt ist, wird ein direkter Kontakt zwischen Transportriemen und Eselsohr wirkungsvoll vermieden.The arrangement shown in FIG. 4 is expediently positioned analogously to FIG. 3, shortly before the deflection roller 3, in such a way that the smallest possible distance remains between the deflection roller 3 and the stripping element, so that a dog's ear 13 does not find any possibility until the deflection roller 3 is reached, to slide behind the conveyor belt. Since the transport belt dips into the stripping element and is therefore partially covered by the stripping element in the critical area, direct contact between the transport belt and the dog's ear is effectively avoided.

Fig. 6 zeigt das erfindungsgemäße Ausstreifelement in verschiedenen Ansichten. Dabei ist erkennbar, daß das Ausstreifelement aus der Transportrichtung des Anwendungsfalls betrachtet (siehe Fig. 4) kegelig-spitz ausgebildet ist, wobei sich die Ausstreifflächen 17 und die Gleitrille 19 von der Spitze 20 aus längs des Elements hin erstrecken. Die Gleitrille 19 gräbt sich von der Spitze 20 beginnend immer tiefer in das Ausstreifelement ein, so daß der Riemen von der Spitze 20 aus betrachtet vom Ausstreifelement immer tiefer umfaßt wird. Die Ausstreifflächen 17 weisen in etwa eine dreieckige Grundform auf, die, bezogen auf die Mittellinie der Transportriemen 2, in leicht ansteigendem spitzen Winkel parallel zum Transportriemen verlaufend angeordnet sind.Fig. 6 shows the stripping element according to the invention in different views. It can be seen that the stripping element viewed from the transport direction of the application (see FIG. 4) is conical-pointed, the stripping surfaces 17 and the sliding groove 19 extending from the tip 20 along the element. The sliding groove 19 digs deeper and deeper into the stripping element starting from the tip 20, so that the belt is viewed deeper and deeper by the stripping element when viewed from the tip 20. The stripping surfaces 17 have an approximately triangular basic shape on, which, relative to the center line of the conveyor belt 2, are arranged parallel to the conveyor belt at a slightly increasing acute angle.

Fig. 7 zeigt eine alternative Ausführungsform des erfindungsgemäßen Ausstreifelements 14. In diesem Fall werden die Ausstreifflächen 17 durch entsprechend gebogene Ausstreifwinkel 23 gebildet, die auf einen Montageblech 22 montiert sind. Die Winkel 23 sind so ausgebildet, daß sie die um den Transportriemen greifenden Eselsohren 13 während des Vorbeitransportes an der schrägen Kante entlanglaufend nach oben biegen und somit das Eselsohr ebenfalls aus dem Klemmbereich des Transportriemens 2 drücken. Bei der in Fig. 7 dargestellten Ausführungsform erfassen die Ausstreifwinkel 23 nur jeweils die von einer Seite des Riemens kommenden Eselsohren. Dem Fachmann ist jedoch klar, daS eine pro Transportriemen beidseitige Wirkungsweise durch entsprechenden symmetrischen Aufbau möglich ist, d. h. im Sinne der Fig. 6 durch Vorsehen von jeweils zwei gegenüberliegenden Ausstreifflächen pro Transportriemen. Ein derart symmetrisch aufgebauter Ausstreifwinkel 23 bietet demnach die gleichen Möglichkeiten wie das in Fig. 6 dargestellte Ausstreifelement 14.7 shows an alternative embodiment of the stripping element 14 according to the invention. In this case, the stripping surfaces 17 are formed by correspondingly bent stripping angles 23 which are mounted on a mounting plate 22. The brackets 23 are designed such that they bend the donkey ears 13 around the transport belt while moving past the oblique edge upwards and thus also push the donkey ear out of the clamping area of the transport belt 2. In the embodiment shown in FIG. 7, the stripping angles 23 only detect the donkey ears coming from one side of the belt. However, it is clear to the person skilled in the art that a mode of operation which is bilateral per transport belt is possible by means of a corresponding symmetrical structure, i. H. in the sense of FIG. 6 by providing two opposite stripping surfaces per conveyor belt. A stripping angle 23 constructed symmetrically in this way therefore offers the same possibilities as the stripping element 14 shown in FIG. 6.

Claims (5)

  1. A belt transport apparatus for conveying thin sheet material wherein the sheet material is grasped by conveyor belts (2) guided over deflection rollers (3), and conveyed in the clamped state, whereby at least one smoothing element (14, 23) is provided on the back of the belts (2), said element being disposed and designed in such a way that parts (13) of the sheet material (1) protruding behind the conveyor belts (2) run onto the smoothing element (14, 23) during transport, characterized in that the smoothing element (14, 23) is disposed at least before the deflection rollers (3), regarded in the direction of transport, and the smoothing element (14, 23) has smoothing areas (17) which, acting as upwardly inclined planes, regarded in the direction of transport, urge the parts of the sheet material (1) protruding behind the belts out of the clamping area of the belt (2).
  2. The belt transport apparatus of claim 1, characterized in that smoothing elements (14, 23) are provided once per conveyor belt (2) on each deflection roller (3).
  3. The belt transport apparatus of claim 1 or 2, characterized in that the smoothing surfaces (17) are provided twice per conveyor belt (2), the two smoothing surfaces forming an acute angle with the center line of the conveyor belt and thus being disposed for smoothing out differently bent dog-ears.
  4. The belt transport apparatus of any of claims 1 to 3, characterized in that the smoothing elements (14) have slide grooves (19) which are designed and disposed relative to the conveyor belt (2) in such a way that the belts are at least partly embraced by the smoothing elements (14).
  5. The belt transport apparatus of one or more of the preceding claims, characterized in that the smoothing elements (14, 23) are embodied either by cast elements or by suitably stamped and bent angle plate elements.
EP92105720A 1991-04-04 1992-04-02 Belt transport system Expired - Lifetime EP0507306B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4110931 1991-04-04
DE4110931A DE4110931A1 (en) 1991-04-04 1991-04-04 BELT TRANSPORT SYSTEM

Publications (2)

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EP0507306A1 EP0507306A1 (en) 1992-10-07
EP0507306B1 true EP0507306B1 (en) 1995-12-06

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EP (1) EP0507306B1 (en)
JP (1) JPH05278919A (en)
AT (1) ATE131133T1 (en)
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US5692745A (en) * 1995-10-18 1997-12-02 Bell And Howell Phillipsburg Company Belt-driven document accumulator having belt-dampening table and side guides
DE19545349A1 (en) * 1995-12-05 1997-06-12 Windmoeller & Hoelscher Device for stiffening flat workpieces made of paper or the like
DE19639539A1 (en) * 1996-09-26 1998-04-02 Eastman Kodak Co Paper feed guides for copier, printer
JP4366010B2 (en) * 2000-12-20 2009-11-18 日立オムロンターミナルソリューションズ株式会社 Bill storage and discharge device and bill handling device
EP1572566B1 (en) * 2002-11-26 2012-01-18 Ricoh Company, Ltd. Stably operable image-forming apparatus with improved paper conveying and ejecting mechanism
JP5011753B2 (en) * 2006-02-28 2012-08-29 サクサ株式会社 Banknote transfer device
JP4862431B2 (en) * 2006-02-28 2012-01-25 サクサ株式会社 Banknote transfer device

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US1357644A (en) * 1917-04-27 1920-11-02 Cottrell C B & Sons Co Cutting and folding machine
US1912724A (en) * 1931-11-30 1933-06-06 Stokes & Smith Co Method and apparatus for spreading fabrics
US3027939A (en) * 1960-03-18 1962-04-03 Sammy R Dumas Currency buffer
GB1150155A (en) * 1965-08-25 1969-04-30 Schlageter Bayerische Maschf Improvements in Machines for Processing Leather or like Sheet Material.
US3470636A (en) * 1967-01-26 1969-10-07 Benjamin Withorn Laundry flatwork feeder
US3758208A (en) * 1970-10-21 1973-09-11 W Robnolte Entry device for reproduction machine
US3807068A (en) * 1971-06-18 1974-04-30 A Ross Flatwork feeder and spreader
US3963339A (en) * 1974-09-05 1976-06-15 Xerox Corporation Sheet feeding apparatus
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FR2358268A1 (en) * 1976-07-12 1978-02-10 Sodern LEAF LEVELING DEVICE
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JPS60130243U (en) * 1984-02-08 1985-08-31 大日本スクリ−ン製造株式会社 Sheet material insertion guide
JPS63230467A (en) * 1987-03-18 1988-09-26 Toshiba Corp Paper sheet transfer device
US5046272A (en) * 1990-05-01 1991-09-10 Kimberly-Clark Corporation Fluid-operated stabilizing apparatus and method

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ATE131133T1 (en) 1995-12-15
ES2080366T3 (en) 1996-02-01
DE59204537D1 (en) 1996-01-18
EP0507306A1 (en) 1992-10-07
DE4110931A1 (en) 1992-10-08
JPH05278919A (en) 1993-10-26
CA2065067A1 (en) 1992-10-05
US5299371A (en) 1994-04-05

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